Grandes Rocques (Beach) (Guernsey) weather

Find a forecast

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.

Head to a lifeguarded beach; check the RNLI lifeguarded beach tool
Follow RNLI Float to Live advice if you find yourself struggling in the water
Know what to do if you get caught in a rip current (RNLI)
Check the tide times to avoid getting cut off by the tide coming in
Call 999 and ask for the coastguard in an emergency
Learn more about staying safe at the beach

Weather forecast Beach forecast

Forecast days

Today

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 10° Celsius;

Sunrise: 05:23

Sunset: 20:52
Sunny.
Beach safety today
Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, the wind may blow you off course

• unsafe for novice surfers

• paddle boarding not recommended for beginners/intermediate
Tide: Next high tide (7.5m) at 10:37
H UV

L Pollution

No pollen data.
Today

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 10° Celsius;
Mon 19 May

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 10° Celsius;

Sunrise: 05:21

Sunset: 20:53

Sunny.

H UV

L Pollution

No pollen data.

Mon 19 May

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 10° Celsius;
Tue 20 May

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 11° Celsius;

Sunrise: 05:20

Sunset: 20:54

Sunny changing to partly cloudy by nighttime.

H UV

L Pollution

No pollen data.

Tue 20 May

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 11° Celsius;
Wed 21 May

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 11° Celsius;

Sunrise: 05:19

Sunset: 20:56

Cloudy changing to sunny intervals by lunchtime.

H UV

L Pollution

No pollen data.

Wed 21 May

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 11° Celsius;
Thu 22 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;

Sunrise: 05:18

Sunset: 20:57

Sunny intervals changing to partly cloudy by nighttime.

H UV

L Pollution

No pollen data.

Thu 22 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;
Fri 23 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;

Sunrise: 05:17

Sunset: 20:58

Sunny intervals changing to partly cloudy by nighttime.

H UV

No pollution data.

No pollen data.

Fri 23 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;
Sat 24 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;

Sunrise: 05:16

Sunset: 20:59

Sunny intervals changing to cloudy by nighttime.

H UV

No pollution data.

No pollen data.

Sat 24 May

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 12° Celsius;
Sun 25 May

Maximum daytime temperature: 15° Celsius;

Sunrise: 05:15

Sunset: 21:01

Cloudy changing to sunny intervals by late morning.

H UV

No pollution data.

No pollen data.

Sun 25 May

Maximum daytime temperature: 15° Celsius;

Sunny.

Beach safety today

Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, the wind may blow you off course

• unsafe for novice surfers
• paddle boarding not recommended for beginners/intermediate

Tide: Next high tide (7.5m) at 10:37

Sunrise: 05:23

Sunset: 20:52

H UV

L Pollution

No pollen data.

8 day forecast for Grandes Rocques (Beach)

Today (18 May 2025)

Time	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	15°	15°	16°	17°	17°	17°	17°	17°	17°	16°	15°	14°	13°	13°
Feels like temperature (°C)	13°	14°	15°	15°	15°	15°	16°	16°	16°	15°	13°	12°	11°	10°
Wind direction and speed (mph)	ENE 9	NE 10	NE 10	NE 11	NE 11	NE 11	NE 10	NE 9	NE 9	NE 10	NE 11	ENE 11	ENE 12	ENE 13
Wind gust (mph)	12	12	12	14	14	14	14	14	14	16	17	18	19	18
Visibility (description)	VG	VG	VG	VG	G	G	G	G	G	G	VG	G	G	G
Humidity	84%	85%	85%	85%	85%	85%	85%	84%	84%	83%	79%	76%	76%	78%
UV	5	6	7	7	6	5	4	2	1	1	1	-	-	-
Wind direction and speed (mph)	9	10	10	11	11	11	10	9	9	10	11	11	12	13
Height of waves offshore (m)	0.7	0.7	0.7	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Period of waves offshore (s)	11	11	11	11	11	11	11	11	11	11	11	11	10	10
Direction of waves offshore

Monday (19 May 2025)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	12°	12°	11°	11°	11°	11°	11°	12°	13°	14°	15°	16°	16°	16°	16°	16°	16°	16°	16°	16°	15°	14°	13°	13°
Feels like temperature (°C)	10°	9°	8°	8°	8°	8°	8°	9°	10°	11°	12°	12°	12°	12°	12°	12°	12°	13°	13°	13°	12°	12°	11°	10°
Wind direction and speed (mph)	ENE 13	ENE 13	ENE 13	ENE 14	ENE 15	ENE 16	ENE 17	ENE 17	ENE 17	ENE 17	ENE 18	ENE 19	ENE 20	NE 21	NE 21	NE 21	NE 20	NE 19	NE 17	NE 16	ENE 14	NE 13	NE 12	NE 13
Wind gust (mph)	19	20	21	23	23	24	25	24	24	23	23	26	28	29	29	28	27	24	22	20	18	17	17	17
Visibility (description)	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	G	VG	VG	VG	VG
Humidity	77%	82%	84%	85%	85%	85%	86%	85%	85%	85%	85%	85%	85%	85%	85%	85%	84%	83%	81%	78%	78%	80%	81%	80%
UV	-	-	-	-	-	1	1	1	2	3	5	6	7	7	6	5	4	2	1	1	1	-	-	-
Wind direction and speed (mph)	13	13	13	14	15	16	16	16	16	16	17	18	20	21	21	21	20	18	17	15	14	12	12	12
Height of waves offshore (m)	0.6	0.6	0.6	0.6	0.6	0.7	0.7	0.7	0.7	0.8	0.8	0.9	0.9	0.9	1.0	1.0	1.0	0.9	0.8	0.7	0.6	0.6	0.6	0.6
Period of waves offshore (s)	10	10	10	10	10	10	10	10	10	10	10	5	5	5	5	5	6	6	9	9	9	9	9	9
Direction of waves offshore

Tuesday (20 May 2025)

Time	00:00	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	12°	12°	12°	12°	15°	16°	17°	17°	13°
Feels like temperature (°C)	10°	10°	9°	10°	13°	15°	17°	16°	12°
Wind direction and speed (mph)	NE 13	NE 13	NE 13	NNE 13	NNE 13	NNE 11	N 8	NW 7	NW 7
Wind gust (mph)	17	19	19	18	15	14	10	11	11
Visibility (description)	VG	VG	VG	VG	VG	G	G	G	G
Humidity	79%	81%	82%	84%	85%	85%	84%	84%	86%
UV	-	-	-	1	5	7	3	1	-
Wind direction and speed (mph)	12	13	13	13	13	11	8	8	8
Height of waves offshore (m)	0.7	0.7	0.7	0.7	0.7	0.7	0.6	0.6	0.6
Period of waves offshore (s)	9	9	12	12	11	11	11	11	11
Direction of waves offshore

Wednesday (21 May 2025)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	10%	20%	30%	50%	40%	30%	30%	30%
Temperature (°C)	12°	12°	13°	14°	15°	15°	14°	13°
Feels like temperature (°C)	11°	11°	11°	12°	12°	12°	12°	10°
Wind direction and speed (mph)	WNW 6	W 7	W 8	W 10	WNW 13	WNW 13	WNW 13	NW 13
Wind gust (mph)	9	12	12	15	18	18	18	17
Visibility (description)	G	G	G	G	VG	VG	VG	VG
Humidity	87%	87%	90%	89%	86%	85%	84%	85%
UV	-	-	1	3	5	3	1	-
Wind direction and speed (mph)	6	7	8	10	12	13	13	13
Height of waves offshore (m)	0.7	0.7	0.7	0.8	0.7	0.6	0.6	0.7
Period of waves offshore (s)	10	10	10	10	10	10	10	10
Direction of waves offshore

Thursday (22 May 2025)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	30%	30%	20%	20%	10%	10%	10%	10%
Temperature (°C)	12°	12°	12°	14°	14°	14°	14°	13°
Feels like temperature (°C)	10°	9°	10°	12°	12°	12°	12°	11°
Wind direction and speed (mph)	NNW 13	N 13	NE 12	NE 12	N 12	NW 12	WNW 13	WNW 12
Wind gust (mph)	15	16	15	13	14	14	14	15
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	86%	85%	84%	82%	83%	81%	79%	80%
UV	-	-	1	5	7	4	1	-
Wind direction and speed (mph)	12	12	12	12	12	12	13	13
Height of waves offshore (m)	0.7	0.7	0.8	0.7	0.7	0.8	0.8	0.7
Period of waves offshore (s)	10	9	9	9	9	9	9	9
Direction of waves offshore

Friday (23 May 2025)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	10%	10%	10%	10%	10%
Temperature (°C)	13°	12°	12°	13°	13°	13°	13°	14°
Feels like temperature (°C)	10°	10°	9°	10°	11°	11°	11°	12°
Wind direction and speed (mph)	WNW 14	NNE 13	NNE 12	NW 12	NNW 12	NNW 12	NW 11	WNW 9
Wind gust (mph)	15	14	14	12	11	12	13	13
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	82%	79%	74%	68%	67%	66%	65%	68%
UV	-	-	1	5	7	4	1	-
Wind direction and speed (mph)	14	13	13	12	13	13	12	10
Height of waves offshore (m)	0.7	0.7	0.6	0.6	0.5	0.5	0.5	0.6
Period of waves offshore (s)	9	9	9	9	9	9	9	9
Direction of waves offshore

Saturday (24 May 2025)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	10%	20%	20%	10%	10%	20%	20%	20%
Temperature (°C)	13°	13°	12°	13°	13°	14°	14°	14°
Feels like temperature (°C)	11°	11°	10°	11°	11°	12°	12°	12°
Wind direction and speed (mph)	W 10	WNW 10	WSW 10	WSW 12	SW 12	SW 12	SW 13	SW 11
Wind gust (mph)	13	13	10	10	10	10	11	14
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	73%	75%	77%	76%	77%	77%	76%	81%
UV	-	-	1	5	7	3	1	-
Wind direction and speed (mph)	11	–	–	–	–	–	–	–
Height of waves offshore (m)	0.7	–	–	–	–	–	–	–
Period of waves offshore (s)	9	–	–	–	–	–	–	–
Direction of waves offshore		–	–	–	–	–	–	–

Sunday (25 May 2025)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	30%	40%	30%	30%	20%	20%	20%	20%
Temperature (°C)	14°	13°	13°	14°	14°	14°	14°	14°
Feels like temperature (°C)	11°	11°	10°	11°	11°	12°	12°	12°
Wind direction and speed (mph)	SSW 12	SSW 12	SSW 12	SSW 14	SSW 14	SW 14	WSW 13	WSW 12
Wind gust (mph)	15	15	16	16	14	15	16	17
Visibility (description)	VG	VG	G	VG	VG	VG	VG	VG
Humidity	81%	83%	85%	85%	85%	83%	82%	85%
UV	-	-	1	4	7	3	1	-
Wind direction and speed (mph)	–	–	–	–	–	–	–	–
Height of waves offshore (m)	–	–	–	–	–	–	–	–
Period of waves offshore (s)	–	–	–	–	–	–	–	–
Direction of waves offshore	–	–	–	–	–	–	–	–